Which events increased the water content in earth’s atmosphere? check all that apply. 1the sun released a strong burst of water vapor. 2water evaporated and condensed to form oceans. 3materials collided due to strong gravitational forces. 4the ozone layer formed to protect against harmful uv ray exposure. 5water vapor increased during formation of the early atmosphere.

This is a situation in which genes are attached to an organism's sex chromosomes; the sex of an organism influences the expression of a gene.

One of the newest applications of cell technology is called cybrid embryos. this process involves replacing the nuclear material of an animal cell with human nuclear material. how might this process affect public policies about research by using stem cells? the same policies and concerns about the use of human embryonic stem cells would most likely apply. the embryos would most likely be treated like traditional animal embryos and regulated accordingly. the process of forming cybrid embryos would most likely be banned by government regulators. the embryos would be treated as regular cells because they are not fully human in origin.

Can a trait be both polygenic and have multiple alleles? explain why or why not.